The Saint Sophia Cathedral, also known as the Hagia Sophia in Kyiv, is one of the oldest and most important churches in Ukraine. It is located in the heart of the city and is considered one of the main landmarks of Kyiv. The cathedral was built in the early 11th century, during the reign of Grand Prince Yaroslav the Wise, and is considered a masterpiece of Byzantine architecture. The cathedral was initially used as a place of worship for the rulers of Kyiv and their families, and it was later used as a political and cultural center.

The Saint Sophia Cathedral is famous for its elaborate and colorful mosaics, which depict biblical scenes and portraits of Byzantine emperors. The cathedral's bell tower, which was added later in the 16th century, is another architectural highlight and offers stunning views of the city.

Throughout its history, the Saint Sophia Cathedral has undergone numerous renovations and restorations, the latest of which took place in the 20th century. Today, the cathedral is a popular tourist destination, attracting visitors from all over the world who come to admire its beauty and history.